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Patent US5128602A successfully refreshed from Google Patents.
US5128602A
Expired / Lapsed
US
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Parallel supply for multiple loads from a single power supply
Assignee: Airbus Group SAS
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Filing: 1991-04-26
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Granted: 1992-07-07
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Expires: 2011-04-26
Abstract
Abstract A single constant voltage power supply concurrently supplies a plurality of independent loads each with an independently selectable constant current load without interaction between the loads (currents) by employing a plurality of parallel connected circuits of electrical lengths equal to (2n-1)90° each connected between the constant voltage source and a different one of said loads.
Inventors
- 👤 Philip S. Carter, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:24
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/577; H02; H02J; H02J4/00; H02J4/20; H02J4/25
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
116 words
A power supply for concurrently supplying a plurality of independent loads having impedance each with an independent selectable constant current without interaction between the loads comprising a constant voltage power supply having an output port connected to a plurality of two port networks each one of which fulfills the conditions Y 22 =0 and Y 21 ≠0 where Y 22 and Y 21 are the equivalent short circuit admittance parameters of each network considered independently of the remaining networks, a first port of each network being connected to the output port of the power supply in parallel with the remaining networks, a second port of each network being connected to a separate and independent electrical load.
Claim 2
Dependent Claim
116 words
A power supply for concurrently supplying a plurality of independent loads having impedance each with an independent selectable constant current without interaction between the loads comprising a constant voltage power supply having an output port connected to a plurality of two port networks each one of which fulfills the conditions Y 22 =0 and Y 21 ≠0 where Y 22 and Y 21 are the equivalent short circuit admittance parameters of each network considered independently of the remaining networks, a first port of each network being connected to the output port of the power supply in parallel with the remaining networks, a second port of each network being connected to a separate and independent electrical load.
Claim 3
Dependent Claim
49 words
A power supply according to claim 1 wherein each network is a uniform transmission line, uniform cable, or uniform waveguide which has an electrical length equal to an odd number of one quarter wavelengths, where the characteristic impedances of each of the quarter wavelength transmission lines are the same.
Claim 4
Dependent Claim
90 words
A power supply according to claim 1 wherein the equivalent short circuit parameters of the network are represented by the symbol Y mn , n and m being positive integers that refer to the various ports of the overall distribution network and all of Y mn being equal to zero with the exception of those parameters for which both m and n are both greater than 1 where n=1 refers to the port at which the networks are connected in parallel and to which the power supply is also connected.
Claim 5
Dependent Claim
80 words
A power supply for concurrently supplying a plurality of independent loads each with an independently selectable constant current load without interaction between the loads comprising an output circuit having an output connection with a constant voltage developed across said connection a plurality of low loss circuits each having an electrical length of (2n-1)90° where n is any one of various even integers each said low loss circuit having its input connection connected to said output connection of said power supply.
Claim 6
Dependent Claim
80 words
A power supply for concurrently supplying a plurality of independent loads each with an independently selectable constant current load without interaction between the loads comprising an output circuit having an output connection with a constant voltage developed across said connection a plurality of low loss circuits each having an electrical length of (2n-1)90° where n is any one of various even integers each said low loss circuit having its input connection connected to said output connection of said power supply.
Claim 7
Dependent Claim
55 words
A power supply according to claim 4 wherein each said low loss circuit is a two port network, and wherein said low loss circuits have a sufficiently low loss that a short circuit across an output port does not effect the current supplied to the output port of any other of said low loss circuits.
Claim 8
Dependent Claim
23 words
A power supply according to claim 1 wherein one or more of each network of the plurality of networks incorporates an ideal transformer.
Claim 9
Dependent Claim
15 words
A power supply according to claim 3 wherein Y 11 is also equal to zero.
Claim 10
Dependent Claim
46 words
A power supply according to claim 1 in which each of the two port networks fulfills the condition Y 11 =0 in addition to the conditions Y 22 =0 and Y 21 ≠0, Y 11 being a short circuit admittance parameter of one of the networks.
Claim 11
Dependent Claim
46 words
A power supply according to claim 1 in which one or more of the plurality of networks consists of a length of low loss transmission line cable or waveguide and a low loss capacitance in parallel at the center of the transmission line, cable or waveguide.
Claim 12
Dependent Claim
66 words
A power supply according to claim 1 in which one or more of the plurality of networks consists of a series inductance L 0 connected to the power generator output plus a parallel capacitance C 0 connected in parallel across the load impedance, for which the condition √L 0 C 0 =1/2πf o is fulfilled where f o is the operating frequency of the power supply.
Claim 13
Dependent Claim
67 words
A power supply according to claim 1 in which one or more of the plurality of networks consists of a series capacitor C 0 connected to the power supply and a parallel inductance L 0 connected in parallel with the impedance of the load for which the condition √L 0 C 0 =1/2πf 0 is fulfilled where f 0 is the operating frequency of the power supply.
Claim 14
Dependent Claim
63 words
A power supply according to claim 1 wherein the equivalent short circuit parameters of the networks are represented by the symbol Y mn , m and n being positive integers that refer to the various ports of the overall distribution network, all of the Y mn being equal to zero except for the case where m≠1 and n=1 and where m=1 and n≠1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-07 | 1996-01-06 | 1996-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-07 | 2000-01-06 | 2000-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-07 | 2004-01-06 | 2004-07-07 | $7700.00 | Window Closed / Lapsed |